Nut-lock.



G. F. SEDDON.

NUT LOCK. APPLICATION FILED NOV. 27, 1909.

Patented July 12, 1910.

NUT-LOCK.

Specification of Letters Patent.

Patented July 12, 1910.

Application filed November 27, 1909. Serial No. 530,090.

I To all whom may concern:

Be it known that I, GEORGE FARQUHARSON SE noN, architect and surveyor, a subject of the King of Great Britain, residing at Warwick .Gourt, Holborn, in the county of London, England, have invented new and useful Nut-Locks, of which the following is a specification.

his invention signed to lock a According to relates to nut locks denut securely on a bolt. this invention I place in the threads of the nut a helical sprlng one end of which is secured to the nut while the other end passes out through a slot cut rahe nut the end of the spring projecting slightly yond the side of the nut.

Figure 1 of the. accompanying drawings is a plan of a nut made in accordance with this 1nvention;-Fig. 2 is an elevation and ig. 3 a section on the line AB of Fig. 1; ig. 4 is a plan view of part of a spanner or wrench which may be used for turning the nut.

In the threads of the nut a lies a helical spring 6 one end 0 ofwhich is located in a groove in the top of the nut and is thereby held fast. The other or free end 03 passes ,out through a radial slot 6 out in the base of the nut and rojects slightly, the slot being slightly wi er than the end of the spring so as to allow 0' movement of such end.

Should the slot be cut at an edge of the nut an ordinary spanner may be used to diall slack the nut provided it be so put on that the tip of one of its jaws comes against the end 03 of the spring and revents it from gripping the bolt. But i desired a small nick may be provided in the spanner as shown at f in Fig. 4 and the spanner may be so put on that this nick will engage the end of the spring. Or if desired a speclal washer with sucha nick in it may be used to hold the spring while the nut is turned.

What I claim is:

l. The combination of a nut havin a radial slot and a helical-spring lying in the threads of the nut and having one end secured to the nut While its other end out freely through said slot.

2. The combination, of a nut havin a relatively wide radial slot and a hellcal spring coiled in the threads of the nut and having one end secured tothe nut while its other end passes out through the radial slot and is free to move therein.

3. The combination of a nut having a ray arranged slot and a helical spring lying in the threads of the nut and having one end secured to the nut while its other end passes out throu beyond he face of t eronen FARQUHARSON SEDDoN.

Witnesses: H. D. 'JAmnsoN, F. L. RAND. 

